參數(shù)資料
型號(hào)： SN74AVC20T245GQLR
廠商： Texas Instruments, Inc.
英文描述： 20 BIT DUAL SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
中文描述： 20位雙電源總線收發(fā)器可配置電壓轉(zhuǎn)換和三態(tài)輸出
文件頁(yè)數(shù)： 2/19頁(yè)
文件大小： 436K
代理商： SN74AVC20T245GQLR
SCES566F MAY 2004 REVISED APRIL 2005
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
The SN74AVC20T245 is designed for asynchronous communication between data buses. The device transmits
data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable (OE) input is used to disable the outputs so that the buses are
isolated.
The SN74AVC20T245 is designed so that the control (1DIR, 2DIR, 1OE, and 2OE) inputs are supplied by V
CCA
.
This device is fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
The V
CC
isolation feature ensures that if either V
CC
input is at GND, both ports are in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE should be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
terminal assignments
1
2
3
4
5
6
A
1B1
1B2
1DIR
1OE
1A2
1A1
B
1B3
1B4
GND
GND
1A4
1A3
C
1B5
1B6
VCCB
GND
VCCA
GND
1A6
1A5
D
1B7
1B8
1A8
1A7
E
F
1B9
1B10
1A10
1A9
2B1
2B2
2A2
2A1
G
2B3
2B4
GND
GND
2A4
2A3
H
2B5
2B6
VCCB
GND
VCCA
GND
2A6
2A5
J
2B7
2B8
2A8
2A7
K
2B9
2B10
2DIR
2OE
2A10
2A9
FUNCTION TABLE
(each 10-bit section)
INPUTS
OPERATION
OE
DIR
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
GQL OR ZQL PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
2
1
3
4
6
5
K
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SN74AVC20T245ZQLR 功能描述:轉(zhuǎn)換 - 電壓電平 20-Bit Dual Supply Bus Transceiver RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
SN74AVC24T245GRGR 功能描述:轉(zhuǎn)換 - 電壓電平 Low Power Low IOVdd Dual Channel RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
SN74AVC24T245ZRGR 功能描述:轉(zhuǎn)換 - 電壓電平 Low Power Low IOVdd Dual Channel RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
SN74AVC2T244DQER 功能描述:轉(zhuǎn)換 - 電壓電平 DUAL BIT DUAL-SUPPLY BUS TRANSCEIVER RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
SN74AVC2T244DQMR 功能描述:轉(zhuǎn)換 - 電壓電平 DUAL BIT DUAL-SUPPLY BUS TRANSCEIVER RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
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